ruby-on-rails - 工厂女郎 : RecordInvalid with association length minimum validation on create

Question

我有模型 Question 是 has_many Answer。我需要一个问题至少有一个答案，我正在使用 rspec

进行测试

validates :answers, length: { minimum: 1 }

我的工厂:

FactoryGirl.define do
  factory :question do
    text "Enunciado de la pregunta"
    transient do
      answers_count 2
    end

    after(:create) do |q, ev|
      create_list(:answer, ev.answers_count, question: q)
    end
  end

  factory :answer do
    text "Enunciado de la respuesta"
  end
end

但是当我在规范文件中执行 create(:question) 时，它会抛出一个 RecordInvalid 异常(create 会尝试保存模型，但关联的答案是在 create 之后创建的) .

尝试更改为 after(:build) 但效果不佳。

如何在没有回调的情况下构建保留 transient answers_count 参数的所需答案？

Answer 1

如您所知，您需要在保存问题之前创建关联。

我想你可能想做这样的事情:

FactoryGirl.define do
  factory :question do
    ...
    answers { [association(:answer, answers_count: 2 )] }
  end
end

或者 build_list 方法可能会有所帮助:

after(:build) do |q, ev|
  build_list(:answer, ev.answers_count, question: q)
end

我能够使用 after(:build) 让它工作。参见 docs after(:build) 及其回调顺序。

我用这个设置让它在 mongo 中工作:

#spec/models/question_spec.rb
describe Question do
  let!( :question ){create :question}

  it 'should work', :focus do
    expect( question ).to be_valid
    puts question.inspect
    puts question.answers.inspect
  end
end

#spec/factories/questions.rb
FactoryGirl.define do
  factory :question do
    text "Enunciado de la pregunta"
    transient do
      answers_count 2
    end

    after(:build) do |q, ev|
      create_list(:answer, ev.answers_count, question: q)
    end
  end

  factory :answer do
    text "Enunciado de la respuesta"
  end
end

#models/question.rb
class Question
  include Mongoid::Document
  include Mongoid::Attributes::Dynamic

  field :text,      type:String

  has_many :answers
  validates_presence_of :answers
end

#models/answer.rb
class Answer
  include Mongoid::Document
  include Mongoid::Attributes::Dynamic

  field :text,      type:String

  belongs_to :question
end

我的测试结果是这样的:

Run options: include {:focus=>true}
#<Question _id: 590a20ef8a681843088580bb, text: "Enunciado de la pregunta">
[#<Answer _id: 590a20ef8a681843088580ba, text: "Enunciado de la respuesta", question_id: BSON::ObjectId('590a20ef8a681843088580bb')>, #<Answer _id: 590a20ef8a681843088580bc, text: "Enunciado de la respuesta", question_id: BSON::ObjectId('590a20ef8a681843088580bb')>]
.

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